/Engine/Source/Runtime/Engine/Classes/Sound/SoundWaveProcedural.h
class USoundWaveProcedural : public [USoundWave](API\Runtime\Engine\Sound\USoundWave)
int32
NumBufferUnderrunSamples
Number of samples to pad with 0 if there isn't enough audio available.
int32
NumSamplesToGeneratePerCallback
The number of PCM samples we want to generate. This can't be larger than SamplesNeeded in GeneratePCMData callback, but can be less.
FOnSoundWavePro...
OnSoundWaveProceduralUnderflow
Called when GeneratePCMData is called but not enough data is available.
int32
SampleByteSize
Size in bytes of a single sample of audio in the procedural audio buffer.